From 336276cf4b41941614809673f44ec8e43b9af6eb Mon Sep 17 00:00:00 2001
From: gouravkr <gourav2711@gmail.com>
Date: Sat, 26 Feb 2022 20:42:27 +0530
Subject: [PATCH] Implemented DateOutOfRange error in find closes date

---
 fincal/fincal.py | 2 +-
 fincal/utils.py  | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/fincal/fincal.py b/fincal/fincal.py
index 036a3cd..862119e 100644
--- a/fincal/fincal.py
+++ b/fincal/fincal.py
@@ -125,7 +125,7 @@ class TimeSeries(TimeSeriesCore):
         return_actual_date: bool = True,
         as_on_match: str = "closest",
         prior_match: str = "closest",
-        closest: str = "previous",
+        closest: Literal["previous", "next", "exact"] = 'previous',
         if_not_found: Literal['fail', 'nan'] = 'fail',
         compounding: bool = True,
         interval_type: Literal['years', 'months', 'days'] = 'years',
diff --git a/fincal/utils.py b/fincal/utils.py
index 097199c..e716c2d 100644
--- a/fincal/utils.py
+++ b/fincal/utils.py
@@ -2,7 +2,7 @@ import datetime
 from dataclasses import dataclass
 from typing import Iterable, List, Literal, Mapping, Sequence, Tuple, Union
 
-from .exceptions import DateNotFoundError
+from .exceptions import DateNotFoundError, DateOutOfRangeError
 
 
 @dataclass
@@ -88,6 +88,11 @@ def _preprocess_match_options(as_on_match: str, prior_match: str, closest: str)
 def _find_closest_date(data, date, delta, if_not_found):
     """Helper function to find data for the closest available date"""
 
+    if delta.days < 0 and date < min(data):
+        raise DateOutOfRangeError(date, 'min')
+    if delta.days > 0 and date > max(data):
+        raise DateOutOfRangeError(date, 'max')
+
     row = data.get(date, None)
     if row is not None:
         return date, row